Background information: Retaining walls are common. Retaining walls are used in many places where a slope would take up too much space. This type of retaining walls with + shaped concrete elements can be found on at least 3 continents, but also in the Netherlands, Germany and Belgium in various places. Some locations that can serve as a good example are:
Northern flyover connections A5 with ring A10. Municipality of Amsterdam (NL)
Europaweg (A15/N15) between Rozenburg (connection Harmsenburg) and the 2nd Maasvlakte (near Missouriweg), at various viaducts. Municipality of Rotterdam (NL)
Underpass German line with A2. Municipality of Boxtel (NL)
Underpass Broekweg with A73. Municipality of Venlo (NL)
Viaduct entrances A201 over N262. Gem. Zaventem (B)
Construction details: The + shaped concrete elements are held together in various ways. For example, during construction, large steel pins are inserted vertically through the horizontally oriented wings of the + shapes. But also at the back of each element, the elements, geotextile and other important components are connected to each other using steel eyes and pins. Geotextile or variants thereof are used to stabilize the ground body and to prevent the concrete elements from "leaking" along the seams. Another interesting detail is that the elements basically have a standard model. Until the edges are discussed. Then it turns out that almost every element is custom-made.
